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Disk Drive Power-Down/Reset Write Error Protecton Disclosure Number: IPCOM000037500D
Original Publication Date: 1989-Feb-01
Included in the Prior Art Database: 2005-Jan-29

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Related People

Corchero, CA [+details]


Disk drives can damage disks mounted therein if system power is removed or a reset occurs while the disk is being updated. Some disk drives maintain limited protection by blocking resets from error conditions until disk updating is complete. However, the blocking mechanism is complex and offers no protection from power removal. Some disk drives maintain protection by a light which signals the operator when a disk is being accessed. These drives are disadvantageous in that operator attention is required, and because the light may not be visible to the operator when the drives are installed in storage controls made by a manufacturer other than that for the drive. The problem thus presented is how to simply and automatically provide protection against disk drive power-down and reset write errors.